We praise a man who feels angry on the right grounds and against the right persons and also in the right manner at the right moment and for the right length of time.
AristotlePlants, again, inasmuch as they are without locomotion, present no great variety in their heterogeneous pacts. For, when the functions are but few, few also are the organs required to effect them. ... Animals, however, that not only live but perceive, present a great multiformity of pacts, and this diversity is greater in some animals than in others, being most varied in those to whose share has fallen not mere life but life of high degree. Now such an animal is man.
AristotleNo democracy can exist unless each of its citizens is as capable of outrage at injustice to another as he is of outrage at unjustice to himself.
Aristotle